Piston drive for compressors



W. GENSECKE.

PISTON DRIVE FOR COMPRESSORS.

APPLICATION FILED JULY 30,192I.

Patented Nov. 141, 1922.

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PISTON DRIVE FOR COMPRESSORS. APPLICATIQN HLED JULY 30 1921- I 1,465,224. Patented Nov. M, 19221..

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- 7' i-EELM .G-ENSEGKE, OF HOMBURG VON DEB, HOHE, GERMANY, ASSIGNOR TO BER.- L ACTIENGESELLSCHAFT FUR EISE'NGIESSEREI UND MASCHINENFABRIKA- HON, or c LOTTENBURG, NEAR BERLIN, GERMANY, A COMPANY OF GERMANY.

PISTON DRIVE FOR COMPRESSORS.

Application filed July 30, 1921. Serial No. 488,633.

To all whom. it may comem:

Be it known that I, Dr. WILHELM GEN- sncnn, of Homburg von der Hohe, a citizen of Germany (whose postofiice address is 87 '5 liomburgerstrame, Homburg v. d. Hohe, Germany), have invented certain new and useful Improvements in Piston Drives for 1 Compressors (for which I have made application for patents in Germany on Dec. 20, 1916, and Apr. 10, 1920, on which have been granted, respectively, Patents 302,807 and 337,746; in Sweden on Apr. 15, 1920, and Feb. 4, 1921; in Switzerland May 28, 1920, on which Patent 88,618 has been ranted, and Jan. 27, 1921; and in England an. 3, 1921, and Feb. 3, 1921), of which the following is a specification.

This invention relates to a piston drive for compressors or a pump and the said invention consists substantially in the provision of means whereb the drive is eifected through the medium 0 a sliding block or crank slide arranged in the centre of the piston, and in which the sliding block or crank slide is moved by means of an'eccentric.

The advantages thereby obtained, consist in the extreme simplicity of the drive and cheapness of production. The invention is more particularlysuitable for short stroke compressors running at high speed. It has already been proposed to drive a double'compressor b means of a centrally arranged crank sli e, but in the known arrangement no eccentric is used, the block of the crank slide being journalled onthe crank pin of a strong and uni-laterally mounted disc, the diameter of which is correspondingly larger than the circle described by the crank pin. In contradistinction to this known ar-' rangement, the eccentric drive according to this invention ofi'ers the advantage of an eccentric, snpported' on both sides by a comparatively weak shaft so that one-sided and unfavorable stresses are obviated, and a better distribution of the masses is possible to ether with an improved guidance and lufirication of the piston.

In the drawings Figure 1 is a vertical longitudinal section and Figure 2 a horizontal longitudinal section of a double-acting compressor according to the invention.

Figure 3 is a vertical longitudinal section and Figure 4 a vertical longitudinal section soon in an angle of 90 to Figure 3 of a modified form of a single acting compressor and F1 re 5 a plan view of Figure 3.

he drawing, Figs. 1 and 2, illustrates a constructional example for double acting air compressors in which a represents a cylinder, and b the piston. For admission of the air, the example illustrated shows suction slots 0, but it is obvious that in their place, other members such as slots, valves, or the like may be employed.

For outlet of the air, automatic valves 0! are provided. In the centre of the piston, a. slot is formed within which a block or crank slide 9 1s so arranged as to slide up and down. The movement of the block or crank slide is eiiected through the medium of an eccentricf mounted on the shaft e.

In addition to, compressors for gases and vapors, the invention may be applied to pumps of any kind. The diameter of the piston I) need, moreover, not be equal on both sides, as illustrated in the particular example, but it may be diflerent thus offering the possibility of a tandem arrangement i. e. compound action.

The Figures 3-5 show a modified form for single acting air compressors. In this modification suflicient piston guidance and lubrication, accompanied by the desired increase in speed, is eii'ected, with still greater simplicity and further reduction in size by making the compressor of the single-acting type and arrangin the guide bar for the sliding block, on t e non-compressing side of the piston as a guide disc for the piston. In this connection it is particularly advantageous to provide this guide disc with openings, in so far that it serves to propel the lubricating oil spirting through the open: ings in the laterally open interior of the piston. In this way, not only the sliding block and eccentric but also the upper piston guide and bearing, are efficiently lubricated, so that it is ossible, with such a compressor althoug single acting, to increase the speed two-fold and even more, to couple it directly with a corresponding high speed prime mover (electromotor, motor car, internal combustion engine and the like) and thus obtain the same output as with the doubleacting compressor of Figures 1 and 2, which, however, has one more delivery valve and takes up a greater longitudinal space.

The drawing shows, in Figures 3-5, a

small vertical compressor of this kind. The upper side of the piston with piston 6, admission ports c and delivery valve 03', correspond to the double-acting compressor of Figures 1 and2, as also the driving eccentric f, with sliding block 9, and the comparatively slight driving shaft 6 mounted on both sides in bearings (preferably ball bearings) it. On the other hand, the piston is arranged differently on the opposite side, inasmuch as the guide bar for the block g is formed on this side, as a circular guide disc 2", and the body of the piston above this is cut through. The guide disc 11' is provided With openings y". The lower portion of the cylinder serves as an oil reservoir, in which the oil lies up to about the lower edge of the bearing h. When running, the disc 2" displaces the underlying oil at each downstroke, this oil spirting up through the openings y" into the interior of the piston and against the eccentric sliding block and the hearing it, and also penetrates, in suficient amount, to the upper side of the piston.

What I do claim as m invention and desire to secure by Letters atent of the United States is 1. A compressor including a tubular casing, a piston reciprocating in the casing having a pair of spaced heads, one of said heads being imperforate, a slide block mounted on the piston between the heads, an eccentric engaging the slide block, means for rotating the eccentric to reciprocate the piston, the

atest,

ing the eccentric to reciprocate the piston,

the path of the slide block being substantially within the plane of the path of the piston heads, and 1nlet and outlet apertures in the casing for the fluid being umped, the inlet apertures being located in the side walls of thecasing in position to be uncovered by the piston as it approaches its innermost 7 position.

3. A compressor or the like comprising a cylinderand piston wherein the guiding end ings and the correspon eating oil is caused to spurt through the said openings into the interior of the and to the working parts thereof.

In testimony whereof I have. affixed my signature in presence of two witnesses.

' WILHELM GENSEOKE {n.s]

Witnesses ROBERT Enema, PETER BAOHINZER.

piston 5'5 or face of the piston is (provided with open-- ing side of the cylinder 1s shaped as an oil well, so that lubri-. 

